Forts

Throughout your travels you will come across a total of seven Forts that are controlled by Templars. They will require a few objectives to take the Fort out of the Templar's hands. Taking forts will reduce total taxes for trade routes and each houses a treasure chest that will reward you with 7500 pounds.

Each fort contains a way of entry that makes it easy to get inside undetected.

Fort Washington has a couple of posts on the water leading to a lower section of the Fort. Simply go left when at the main gate and be careful not to get too close. When you find the posts, jump across and there will be a haystack nearby to hide in.

Fort Division has an opening in the wall on the bottom that you can swim under. Go right from the main entrance till you find a patch of land with a rock on the end pointed in the direction of the fort. The hole is around there. Swim under it turn left and make sure to stealth assassinate the guard standing nearby before you jump on the platform.

Fort Hill has a tunnel that leads inside. It is on the left side of the fort. There are two guards guarding the front of the tunnel. Once you kill them there are two guards inside the tunnel. Finally there is one guard at the top of the stairs just outside the tunnel.

Fort Monmouth has a cart with a haystack nearby that can be used to travel deeper into the Fort without detection.

Where to Look?

They're are usually by the edges of the maps and you will definitely find them if you are going for the 100% tile in the game considering one of the frontier challenges is explore all of Boston, New York, and the Frontier.

Tactics

To capture a fort, players must accomplish three goals:

Kill the fort's captain

Destroy the powder reserve

Replace the British flag with an American one

For those players looking for a quick and dirty approach to taking over forts, there is an easy way to accomplish these three goals. Mount your horse and ride through the main gate of the fort. Quickly dismount and begin running towards the red dot on your screen. This signals where the fort's captain is. Ignore all pursuing or attacking soldiers as they will be unable to catch you. Sprint-kill the captain and pause to finish off any attackers. Once your attackers are clear, run to the new red dot on your screen. This is the powder reserve. If you are noticed, kill the new set of soldiers who arrive and then interact with the powder reserve. As the counter counts down, identify and run toward the flag. If you encounter anyone on your way to the flag, sprint-kill them and continue on. As long as no large groups notice you, you will be able to take over the fort right away. If a large group does notice you, simply eliminate or move away from them and, once threat is lost, you will be able to interact with the flag. This tactic will typically take less than five minutes and avoids any need for sneaking around.